Someone has loose lips. Bet the other one isn’t going to like this one too much. Let’s hope it doesn’t derail the Spice Girls reunion tour this summer.

Apparently, during the girl group’s hey day, two of the Spices hooked up. Any guesses? During an interview with Piers Morgan, Mel B revealed she once hooked up with Geri Halliwell. If I had to guess, these would’ve been the ones I would’ve picked.

“She’s going to hate me for this because she’s all posh in her country house and her husband. But it’s a fact. It just happened and we just giggled at it and that was it,” Mel spilled to Morgan for his upcoming Life Stories series.

“We were best friends. It just happened,” she added. ” It just happens one time, you talk about it and it doesn’t really happen again… She’s going to kill me and so is her husband. She’s not that posh now, is she?”

When asked why she didn’t include this juicy tidbit in her autobiography, Brown said she wanted to focus on other aspects of her life.

Mel C, aka Sporty Spice, was in the audience during the interview and apparently looked “horrified” when it all came out. She probably knows this will cause major turbulence en route to their reunion tour.